The White House revoked Jim Acosta’s press credentials Wednesday after he had a heated exchange with President Donald Trump at a news conference and an intern tried to grab a microphone from the CNN reporter.

“As a result of today’s incident, the White House is suspending the hard pass of the reporter involved until further notice,” White House press secretary Sarah Huckabee Sanders told reporters.

Acosta also tweeted that he had been denied entrance to the White House, where he was scheduled to film a spot for CNN, a network Trump has repeatedly targeted as “fake news.”

I’ve just been denied entrance to the WH. Secret Service just informed me I cannot enter the WH grounds for my 8pm hit

The US Secret Service just asked for my credential to enter the WH. As I told the officer, I don’t blame him. I know he’s just doing his job. (Sorry this video is not rightside up) pic.twitter.com/juQeuj3B9R

CNN addressed the decision Wednesday, calling it an “unprecedented decision” based on “lies.” The news outlet said Acosta had the network’s full support.

“It was done in retaliation for his challenging questions at today’s press conference,” CNN communications said in a statement posted to Twitter. “In an explanation, Press Secretary Sarah Sanders lied. She provided fraudulent accusations and cited an incident that never happened.”

“This unprecedented decision is a threat to our democracy and the country deserves better,” the company continued.

At the White House news conference Wednesday, Trump called Acosta a “rude, terrible person” when he refused to sit down after asking the president about a racist anti-immigration ad his re-election campaign had paid for and promoted ahead of Tuesday’s midterm elections.

Acosta refused to give up the microphone when a White House intern tried to grab it from him, infuriating Trump.

“I’ll tell you what, CNN should be ashamed of itself having you working for them ... You shouldn’t be working for CNN,” Trump said to Acosta.

In a series of statements on Twitter, Sanders characterized Acosta’s actions as “placing his hands on a young woman,” though video of the exchange shows Acosta turning away from her as the intern reaches over his arm to take the microphone from his hand.

“This is a lie,” Acosta tweeted back at Sanders.

Reporters quickly began defending Acosta and denounced the accusation Sanders lodged at him.